diff --git a/mathics/builtin/arithfns/basic.py b/mathics/builtin/arithfns/basic.py
index 2729ba25a..1d4385a14 100644
--- a/mathics/builtin/arithfns/basic.py
+++ b/mathics/builtin/arithfns/basic.py
@@ -120,6 +120,7 @@ class Divide(BinaryOperator):
       <dt>'$a$ / $b$'
       <dd>represents the division of $a$ by $b$.
     </dl>
+
     >> 30 / 5
      = 6
     >> 1 / 8
@@ -579,6 +580,7 @@ class Times(BinaryOperator, SympyFunction):
       <dt>'$a$ $b$ ...'
       <dd>represents the product of the terms $a$, $b$, ...
     </dl>
+
     >> 10 * 2
      = 20
     >> 10 2
diff --git a/mathics/builtin/arithmetic.py b/mathics/builtin/arithmetic.py
index f73d0699f..3ae339406 100644
--- a/mathics/builtin/arithmetic.py
+++ b/mathics/builtin/arithmetic.py
@@ -180,6 +180,7 @@ class Assuming(Builtin):
       <dt>'Assuming[$cond$, $expr$]'
       <dd>Evaluates $expr$ assuming the conditions $cond$.
     </dl>
+
     >> $Assumptions = { x > 0 }
      = {x > 0}
     >> Assuming[y>0, ConditionalExpression[y x^2, y>0]//Simplify]
diff --git a/mathics/builtin/assignments/assignment.py b/mathics/builtin/assignments/assignment.py
index 43f39d775..b948796fe 100644
--- a/mathics/builtin/assignments/assignment.py
+++ b/mathics/builtin/assignments/assignment.py
@@ -65,6 +65,7 @@ class LoadModule(Builtin):
       <dt>'LoadModule[$module$]'
       <dd>'Load Mathics definitions from the python module $module$
     </dl>
+
     >> LoadModule["nomodule"]
      : Python import errors with: No module named 'nomodule'.
      = $Failed
diff --git a/mathics/builtin/assignments/clear.py b/mathics/builtin/assignments/clear.py
index 7ef50cb15..4f8da6e40 100644
--- a/mathics/builtin/assignments/clear.py
+++ b/mathics/builtin/assignments/clear.py
@@ -179,6 +179,7 @@ class Remove(Builtin):
       <dt>'Remove[$x$]'
       <dd>removes the definition associated to $x$.
     </dl>
+
     >> a := 2
     >> Names["Global`a"]
      = {a}
@@ -214,6 +215,7 @@ class Unset(PostfixOperator):
       <dt>'$x$=.'
       <dd>removes any value belonging to $x$.
     </dl>
+
     >> a = 2
      = 2
     >> a =.
diff --git a/mathics/builtin/atomic/strings.py b/mathics/builtin/atomic/strings.py
index 99fcc5d24..011edf569 100644
--- a/mathics/builtin/atomic/strings.py
+++ b/mathics/builtin/atomic/strings.py
@@ -389,6 +389,7 @@ class InterpretedBox(PrefixOperator):
       <dt>'InterpretedBox[$box$]'
       <dd>is the ad hoc fullform for \! $box$. just for internal use...
     </dl>
+
     >> \! \(2+2\)
      = 4
     """
diff --git a/mathics/builtin/binary/system.py b/mathics/builtin/binary/system.py
index 91d3eacd2..8887ebe8d 100644
--- a/mathics/builtin/binary/system.py
+++ b/mathics/builtin/binary/system.py
@@ -20,6 +20,7 @@ class ByteOrdering(Predefined):
       that specifies what ordering of bytes should be assumed for your \
       computer system..
     </dl>
+
     """
 
     name = "ByteOrdering"
@@ -34,6 +35,7 @@ class ByteOrdering_(Predefined):
           <dt>'$ByteOrdering'
           <dd>returns the native ordering of bytes in binary data on your computer system.
         </dl>
+
     """
 
     name = "$ByteOrdering"
diff --git a/mathics/builtin/binary/types.py b/mathics/builtin/binary/types.py
index d1c7a7991..c9c391e79 100644
--- a/mathics/builtin/binary/types.py
+++ b/mathics/builtin/binary/types.py
@@ -15,6 +15,7 @@ class Byte(Builtin):
       <dt>'Byte'
       <dd>is a data type for 'Read'.
     </dl>
+
     """
 
     summary_text = "single byte of data, returned as an integer"
diff --git a/mathics/builtin/datentime.py b/mathics/builtin/datentime.py
index 0f31fef91..e2bc73543 100644
--- a/mathics/builtin/datentime.py
+++ b/mathics/builtin/datentime.py
@@ -589,6 +589,7 @@ class DateObject(_DateFormat, ImmutableValueMixin):
       <dt>'DateObject[...]'
       <dd> Returns an object codifiyng DateList....
     </dl>
+
     >> DateObject[{2020, 4, 15}]
      = [...]
     """
diff --git a/mathics/builtin/directories/system_directories.py b/mathics/builtin/directories/system_directories.py
index 15b0e5352..4296ead51 100644
--- a/mathics/builtin/directories/system_directories.py
+++ b/mathics/builtin/directories/system_directories.py
@@ -61,6 +61,7 @@ class InstallationDirectory(Predefined):
       <dt>'$InstallationDirectory'
       <dd>returns the top-level directory in which \\Mathics was installed.
     </dl>
+
     >> $InstallationDirectory
      = ...
     """
diff --git a/mathics/builtin/drawing/drawing_options.py b/mathics/builtin/drawing/drawing_options.py
index 464bd2417..9f08116a6 100644
--- a/mathics/builtin/drawing/drawing_options.py
+++ b/mathics/builtin/drawing/drawing_options.py
@@ -146,6 +146,7 @@ class ChartLegends(Builtin):
       <dd>is an option for charting functions that specifies the legends to be used \
           for chart elements.
     </dl>
+
     """
 
     summary_text = "chart option for giving legends to a chart"
@@ -175,6 +176,7 @@ class Full(Builtin):
       <dt>'Full'
       <dd>is a possible value for the 'Mesh' and 'PlotRange' options.
     </dl>
+
     """
 
     summary_text = "graph option value for Mesh and PlotRange"
@@ -301,6 +303,7 @@ class PlotRange(Builtin):
       <dd>is a charting option, such as for 'Plot', 'BarChart', 'PieChart', \
           etc. that gives the range of coordinates to include in a plot.
     </dl>
+
     <ul>
       <li>All all points are included.
       <li>Automatic - outlying points are dropped.
diff --git a/mathics/builtin/drawing/plot.py b/mathics/builtin/drawing/plot.py
index 9d3c796b3..2ffe3d2bb 100644
--- a/mathics/builtin/drawing/plot.py
+++ b/mathics/builtin/drawing/plot.py
@@ -1347,6 +1347,7 @@ class ColorDataFunction(Builtin):
       <dt>'ColorDataFunction[range, ...]'
       <dd> is a function that represents a color scheme.
     </dl>
+
     """
 
     summary_text = "color scheme object"
diff --git a/mathics/builtin/evaluation.py b/mathics/builtin/evaluation.py
index 9ac176fef..0bb692059 100644
--- a/mathics/builtin/evaluation.py
+++ b/mathics/builtin/evaluation.py
@@ -119,6 +119,7 @@ class Hold(Builtin):
     <dt>'Hold[$expr$]'
         <dd>prevents $expr$ from being evaluated.
     </dl>
+
     >> Attributes[Hold]
      = {HoldAll, Protected}
     """
@@ -136,6 +137,7 @@ class HoldComplete(Builtin):
         <dd>prevents $expr$ from being evaluated, and also prevents
         'Sequence' objects from being spliced into argument lists.
     </dl>
+
     >> Attributes[HoldComplete]
      = {HoldAllComplete, Protected}
     """
@@ -253,6 +255,7 @@ class ReleaseHold(Builtin):
         <dd>removes any 'Hold', 'HoldForm', 'HoldPattern' or
         'HoldComplete' head from $expr$.
     </dl>
+
     >> x = 3;
     >> Hold[x]
      = Hold[x]
diff --git a/mathics/builtin/fileformats/htmlformat.py b/mathics/builtin/fileformats/htmlformat.py
index 6cd5e6589..d7c7c8338 100644
--- a/mathics/builtin/fileformats/htmlformat.py
+++ b/mathics/builtin/fileformats/htmlformat.py
@@ -278,6 +278,7 @@ class DataImport(_DataImport):
     <dt>'HTML`DataImport["filename"]'
     <dd> imports data from a HTML file.
     </dl>
+
     >> Import["ExampleData/PrimeMeridian.html", "Data"][[1, 1, 2, 3]]
      = {Washington, D.C., 77...03′56.07″ W (1897) or 77...04′02.24″ W (NAD 27) or 77...04′01.16″ W (NAD 83), New Naval Observatory meridian}
 
@@ -344,6 +345,7 @@ class ImageLinksImport(_LinksImport):
     <dt>'HTML`ImageLinksImport["filename"]'
     <dd> imports links to the images included in a HTML file.
     </dl>
+
     >> Import["ExampleData/PrimeMeridian.html", "ImageLinks"][[6]]
      = //upload.wikimedia.org/wikipedia/commons/thumb/d/d5/Prime_meridian.jpg/180px-Prime_meridian.jpg
     """
@@ -366,6 +368,7 @@ class PlaintextImport(_TagImport):
       <dt>'HTML`PlaintextImport["filename"]'
       <dd> imports plane text from a HTML file.
     </dl>
+
     >> DeleteDuplicates[StringCases[Import["ExampleData/PrimeMeridian.html"], RegularExpression["Wiki[a-z]+"]]]
      = {Wikipedia, Wikidata, Wikibase, Wikimedia}
     """
@@ -391,6 +394,7 @@ class SourceImport(_HTMLBuiltin):
       <dt>'HTML`SourceImport["filename"]'
       <dd> imports source code from a HTML file.
     </dl>
+
     >> DeleteDuplicates[StringCases[Import["ExampleData/PrimeMeridian.html", "Source"], RegularExpression["<t[a-z]+>"]]]
      = {<title>, <tr>, <th>, <td>}
     """
@@ -417,6 +421,7 @@ class TitleImport(_TagImport):
       <dt>'HTML`TitleImport["filename"]'
       <dd> imports the title string from a HTML file.
     </dl>
+
     >> Import["ExampleData/PrimeMeridian.html", "Title"]
      = Prime meridian - Wikipedia
     """
@@ -438,6 +443,7 @@ class XMLObjectImport(_HTMLBuiltin):
     <dt>'HTML`XMLObjectImport["filename"]'
     <dd> imports XML objects from a HTML file.
     </dl>
+
     >> Part[Import["ExampleData/PrimeMeridian.html", "XMLObject"], 2, 3, 1, 3, 2]
      = XMLElement[title, {}, {Prime meridian - Wikipedia}]
     """
diff --git a/mathics/builtin/fileformats/xmlformat.py b/mathics/builtin/fileformats/xmlformat.py
index caa9fdf51..a93dfb39c 100644
--- a/mathics/builtin/fileformats/xmlformat.py
+++ b/mathics/builtin/fileformats/xmlformat.py
@@ -294,6 +294,7 @@ class XMLGetString(_Get):
     <dt>'XML`Parser`XMLGetString["string"]'
     <dd>parses "string" as XML code, and returns an XMLObject.
     </dl>
+
     >> Head[XML`Parser`XMLGetString["<a></a>"]]
      = XMLObject[Document]
 
diff --git a/mathics/builtin/files_io/files.py b/mathics/builtin/files_io/files.py
index 9263b6124..cb930cf8f 100644
--- a/mathics/builtin/files_io/files.py
+++ b/mathics/builtin/files_io/files.py
@@ -721,6 +721,7 @@ class Read(Builtin):
       <dd>reads the input stream for an Expression and puts it inside 'Hold'.
 
     </dl>
+
     $type$ is one of:
     <ul>
       <li>Byte
diff --git a/mathics/builtin/functional/composition.py b/mathics/builtin/functional/composition.py
index 2c5853282..9d9c969f9 100644
--- a/mathics/builtin/functional/composition.py
+++ b/mathics/builtin/functional/composition.py
@@ -79,6 +79,7 @@ class Identity(Builtin):
       <dt>'Identity[$x$]'
       <dd>is the identity function, which returns $x$ unchanged.
     </dl>
+
     X> Identity[x]
      = x
     X> Identity[x, y]
diff --git a/mathics/builtin/graphics.py b/mathics/builtin/graphics.py
index 2af729e66..45cf787ea 100644
--- a/mathics/builtin/graphics.py
+++ b/mathics/builtin/graphics.py
@@ -1339,6 +1339,7 @@ class EdgeForm(Builtin):
       <dt> 'EdgeForm[$g$]'
       <dd> is a graphics directive that specifies that edges of filled graphics objects are to be drawn using the graphics directive or list of directives $g$.
     </dl>
+
     >> Graphics[{EdgeForm[{Thick, Green}], Disk[]}]
      = -Graphics-
 
diff --git a/mathics/builtin/kernel_sessions.py b/mathics/builtin/kernel_sessions.py
index 4e1cbaf50..215f76514 100644
--- a/mathics/builtin/kernel_sessions.py
+++ b/mathics/builtin/kernel_sessions.py
@@ -98,5 +98,6 @@ class Exit(Quit):
       <dt>'Exit[$n$]'
       <dd> Terminates the mathics session with exit code $n$.
     </dl>
+
     'Exit' is the same thing as 'Quit'.
     """
diff --git a/mathics/builtin/list/associations.py b/mathics/builtin/list/associations.py
index ed0a7b6b7..f28930bc2 100644
--- a/mathics/builtin/list/associations.py
+++ b/mathics/builtin/list/associations.py
@@ -272,6 +272,7 @@ class Missing(Builtin):
       <dd>'Missing[]'
       <dt> represents a data that is missing.
     </dl>
+
     >> ElementData["Meitnerium","MeltingPoint"]
      = Missing[NotAvailable]
     """
diff --git a/mathics/builtin/mainloop.py b/mathics/builtin/mainloop.py
index e56194e3e..49548b498 100644
--- a/mathics/builtin/mainloop.py
+++ b/mathics/builtin/mainloop.py
@@ -37,6 +37,7 @@ class HistoryLength(Builtin):
       <dt>'$HistoryLength'
       <dd>specifies the maximum number of 'In' and 'Out' entries.
     </dl>
+
     >> $HistoryLength
      = 100
     >> $HistoryLength = 1;
@@ -68,6 +69,7 @@ class In(Builtin):
       <dt>'In[$k$]'
         <dd>gives the $k$th line of input.
       </dl>
+
     >> x = 1
      = 1
     >> x = x + 1
@@ -207,6 +209,7 @@ class Line(Builtin):
       <dt>'$Line'
       <dd>holds the current input line number.
     </dl>
+
     >> $Line
      = 1
     >> $Line
diff --git a/mathics/builtin/numbers/algebra.py b/mathics/builtin/numbers/algebra.py
index c62df6312..f97e991d5 100644
--- a/mathics/builtin/numbers/algebra.py
+++ b/mathics/builtin/numbers/algebra.py
@@ -1671,6 +1671,7 @@ class FullSimplify(Simplify):
       <dt>'FullSimplify[$expr$, $assump$]'
       <dd>simplifies $expr$ assuming $assump$ instead of $Assumptions$.
     </dl>
+
     TODO: implement the extension. By now, this does the same than Simplify...
 
     >> FullSimplify[2*Sin[x]^2 + 2*Cos[x]^2]
diff --git a/mathics/builtin/numbers/constants.py b/mathics/builtin/numbers/constants.py
index 4eb1e6a6b..9fef149a7 100644
--- a/mathics/builtin/numbers/constants.py
+++ b/mathics/builtin/numbers/constants.py
@@ -298,6 +298,7 @@ class Degree(_MPMathConstant, _NumpyConstant, _SympyConstant):
       <dt>'Degree'
       <dd>is the number of radians in one degree. It has a numerical value of \u03c0 / 180.
     </dl>
+
     >> Cos[60 Degree]
      = 1 / 2
 
diff --git a/mathics/builtin/numbers/randomnumbers.py b/mathics/builtin/numbers/randomnumbers.py
index 77910941e..c7cbd8903 100644
--- a/mathics/builtin/numbers/randomnumbers.py
+++ b/mathics/builtin/numbers/randomnumbers.py
@@ -229,6 +229,7 @@ class Random(Builtin):
           $type$, in the specified interval $range$. Possible types are \
           'Integer', 'Real' or 'Complex'.
     </dl>
+
     Legacy function. Superseded by RandomReal, RandomInteger and RandomComplex.
 
     """
diff --git a/mathics/builtin/numeric.py b/mathics/builtin/numeric.py
index 613a1a03a..80f5a08c0 100644
--- a/mathics/builtin/numeric.py
+++ b/mathics/builtin/numeric.py
@@ -175,6 +175,7 @@ class N(Builtin):
     <dt>'N[$expr$, $prec$]'
         <dd>evaluates $expr$ numerically with a precision of $prec$ digits.
     </dl>
+
     >> N[Pi, 50]
      = 3.1415926535897932384626433832795028841971693993751
 
@@ -553,6 +554,7 @@ class RealAbs(Builtin):
       <dt>'RealAbs[$x$]'
       <dd>returns the absolute value of a real number $x$.
     </dl>
+
     'RealAbs' is also known as modulus. It is evaluated if $x$ can be compared \
     with $0$.
 
@@ -595,6 +597,7 @@ class RealSign(Builtin):
       <dd>returns -1, 0 or 1 depending on whether $x$ is negative,
       zero or positive.
     </dl>
+
     'RealSign' is also known as $sgn$ or $signum$ function.
 
     >> RealSign[-3.]
diff --git a/mathics/builtin/patterns.py b/mathics/builtin/patterns.py
index 46a8c433f..3b7eed271 100644
--- a/mathics/builtin/patterns.py
+++ b/mathics/builtin/patterns.py
@@ -1490,6 +1490,7 @@ class Longest(Builtin):
       <dd>is a pattern object that matches the longest sequence consistent \
       with the pattern $p$.
     </dl>
+
     >> StringCases["aabaaab", Longest["a" ~~ __ ~~ "b"]]
      = {aabaaab}
 
@@ -1716,6 +1717,7 @@ class DispatchAtom(AtomBuiltin):
           In the future, it should return an optimized DispatchRules atom, \
           containing an optimized set of rules.
     </dl>
+
     >> rules = {{a_,b_}->a^b, {1,2}->3., F[x_]->x^2};
     >> F[2] /. rules
      = 4
diff --git a/mathics/builtin/procedural.py b/mathics/builtin/procedural.py
index 3ebb5f8d8..250183359 100644
--- a/mathics/builtin/procedural.py
+++ b/mathics/builtin/procedural.py
@@ -49,6 +49,7 @@ class Abort(Builtin):
       <dt>'Abort[]'
       <dd>aborts an evaluation completely and returns '$Aborted'.
     </dl>
+
     >> Print["a"]; Abort[]; Print["b"]
      | a
      = $Aborted
@@ -70,6 +71,7 @@ class Break(Builtin):
       <dt>'Break[]'
       <dd>exits a 'For', 'While', or 'Do' loop.
     </dl>
+
     >> n = 0;
     >> While[True, If[n>10, Break[]]; n=n+1]
     >> n
@@ -245,6 +247,7 @@ class Do(IterationFunction):
       <dd>evaluates $expr$ for each $j$ from $jmin$ to $jmax$, for each $i$ from $imin$
           to $imax$, etc.
     </dl>
+
     >> Do[Print[i], {i, 2, 4}]
      | 2
      | 3
@@ -392,6 +395,7 @@ class Interrupt(Builtin):
       <dt>'Interrupt[]'
       <dd>Interrupt an evaluation and returns '$Aborted'.
     </dl>
+
     >> Print["a"]; Interrupt[]; Print["b"]
      | a
      = $Aborted
diff --git a/mathics/builtin/specialfns/gamma.py b/mathics/builtin/specialfns/gamma.py
index 7369e0ba6..625f25443 100644
--- a/mathics/builtin/specialfns/gamma.py
+++ b/mathics/builtin/specialfns/gamma.py
@@ -42,6 +42,7 @@ class Beta(MPMathMultiFunction):
           <dt>'Beta[$z$, $a$, $b$]'
           <dd>gives the incomplete Beta function.
         </dl>
+
         The Beta function satisfies the property
         Beta[x, y] = Integrate[t^(x-1)(1-t)^(y-1),{t,0,1}] = Gamma[a] Gamma[b] / Gamma[a + b]
         >> Beta[2, 3]
@@ -174,6 +175,7 @@ class Factorial2(PostfixOperator, MPMathFunction):
       <dt>'$n$!!'
       <dd>computes the double factorial of $n$.
     </dl>
+
     The double factorial or semifactorial of a number $n$, is the product of all the \
     integers from 1 up to n that have the same parity (odd or even) as $n$.
 
diff --git a/mathics/builtin/system.py b/mathics/builtin/system.py
index 30f4ab8fe..9948253f9 100644
--- a/mathics/builtin/system.py
+++ b/mathics/builtin/system.py
@@ -132,6 +132,7 @@ class CommandLine(Predefined):
     <dt>'$CommandLine'
       <dd>is a list of strings passed on the command line to launch the Mathics3 session.
     </dl>
+
     >> $CommandLine
      = {...}
     """
@@ -154,6 +155,7 @@ class Environment(Builtin):
       <dt>'Environment[$var$]'
       <dd>gives the value of an operating system environment variable.
     </dl>
+
     X> Environment["HOME"]
      = ...
     """
@@ -215,6 +217,7 @@ class Machine(Predefined):
         <dd>returns a string describing the type of computer system on which the \
             Mathics3 is being run.
     </dl>
+
     X> $Machine
      = linux
     """
@@ -235,6 +238,7 @@ class MachineName(Predefined):
       <dd>is a string that gives the assigned name of the computer on which Mathics3 \
           is being run, if such a name is defined.
     </dl>
+
     X> $MachineName
      = buster
     """
@@ -360,6 +364,7 @@ class PythonImplementation(Predefined):
     <dt>'$PythonImplementation'
         <dd>gives a string indication the Python implementation used to run Mathics3.
     </dl>
+
     >> $PythonImplementation
     = ...
     """
@@ -381,6 +386,7 @@ class ScriptCommandLine(Predefined):
       <dt>'$ScriptCommandLine'
       <dd>is a list of string arguments when running the kernel is script mode.
     </dl>
+
     >> $ScriptCommandLine
      = {...}
     """
@@ -408,6 +414,7 @@ class Run(Builtin):
       <dd>runs command as an external operating system command, returning the exit \
          code returned from running the system command.
     </dl>
+
     X> Run["date"]
      = ...
     """
@@ -428,6 +435,7 @@ class SystemID(Predefined):
        <dt>'$SystemID'
        <dd>is a short string that identifies the type of computer system on which the \Mathics is being run.
     </dl>
+
     X> $SystemID
      = linux
     """
@@ -447,6 +455,7 @@ class SystemWordLength(Predefined):
       <dd>gives the effective number of bits in raw machine words on the computer \
           system where Mathics3 is running.
     </dl>
+
     X> $SystemWordLength
     = 64
     """
diff --git a/mathics/builtin/testing_expressions/logic.py b/mathics/builtin/testing_expressions/logic.py
index 9ffc80118..534c19bde 100644
--- a/mathics/builtin/testing_expressions/logic.py
+++ b/mathics/builtin/testing_expressions/logic.py
@@ -394,6 +394,7 @@ class Nand(Builtin):
       <dt>$expr1$ \u22BC $expr2$ \u22BC ...
       <dd> Implements the logical NAND function.  The same as 'Not[And['$expr1$, $expr2$, ...']]'
     </dl>
+
     >> Nand[True, False]
      = True
     """
@@ -415,6 +416,7 @@ class Nor(Builtin):
       <dt>$expr1$ \u22BD $expr2$ \u22BD ...
       <dd>Implements the logical NOR function.  The same as 'Not[Or['$expr1$, $expr2$, ...']]'
     </dl>
+
     >> Nor[True, False]
      = False
     """
diff --git a/mathics/builtin/testing_expressions/numerical_properties.py b/mathics/builtin/testing_expressions/numerical_properties.py
index 02205eaa3..cb8834487 100644
--- a/mathics/builtin/testing_expressions/numerical_properties.py
+++ b/mathics/builtin/testing_expressions/numerical_properties.py
@@ -245,6 +245,7 @@ class Negative(Builtin):
       <dt>'Negative[$x$]'
       <dd>returns 'True' if $x$ is a negative real number.
     </dl>
+
     >> Negative[0]
      = False
     >> Negative[-3]