Remove extra whitespace (#1560)

Author: ezio-melotti

getting-started/setup-building.rst

@@ -740,7 +740,7 @@ some of CPython's modules (for example, ``zlib``).
       $ sudo dnf install \
             gcc gcc-c++ gdb lzma glibc-devel libstdc++-devel openssl-devel \
             readline-devel zlib-devel libzstd-devel libffi-devel bzip2-devel \
-            xz-devel  sqlite sqlite-devel sqlite-libs libuuid-devel gdbm-libs \
+            xz-devel sqlite sqlite-devel sqlite-libs libuuid-devel gdbm-libs \
             perf expat expat-devel mpdecimal python3-pip