The Profiling section should not be a subsection of PyPI installation

Author: jmarshall

doc/installation.rst

@@ -76,19 +76,6 @@ environment-varirable `LD_LIBRARY_PATH`.
 Note that generally the pysam and htslib version need to be
 compatible. See the release notes for more information.
 
-Profiling
----------
-
-Pysam's Cython code is no longer built with Python profiling enabled by default.
-Profiling can be enabled when building it yourself from source by setting the
-environment variable `PYSAM_PROFILE`::
-
-    export PYSAM_PROFILE=1
-    pip install --no-binary pysam pysam
-
-Note that when installing via pip you will need to use ``--no-binary pysam`` to
-ensure pip does not simply install a pre-built wheel.
-
 Installation from repository
 ============================
 
@@ -117,9 +104,15 @@ the htslib/INSTALL file.
 
 Installing from the repository will require cython_ to be installed.
 
+Profiling
+=========
 
+Pysam's Cython code is no longer built with Python profiling enabled by default.
+Profiling can be enabled when building it yourself from source by setting the
+environment variable `PYSAM_PROFILE`, for example::
 
+    export PYSAM_PROFILE=1
+    pip install --no-binary pysam pysam
 
-
-
-
+Note that when installing via pip you will need to use ``--no-binary pysam`` to
+ensure pip does not simply install a pre-built wheel.