[gnome-builder] doc: tweak section ordering and prose

[Christian Hergert <chergert src gnome org>]

commit 9191461d4014c6549d278ca6e2f3c2fdbb452fe1
Author: Christian Hergert <chergert redhat com>
Date:   Sun Oct 15 14:11:46 2017 -0700

    doc: tweak section ordering and prose

 doc/howto/search_for_symbol.rst |   19 +++++++++++--------
 1 files changed, 11 insertions(+), 8 deletions(-)
---
diff --git a/doc/howto/search_for_symbol.rst b/doc/howto/search_for_symbol.rst
index 10a9030..14d3934 100644
--- a/doc/howto/search_for_symbol.rst
+++ b/doc/howto/search_for_symbol.rst
@@ -9,8 +9,17 @@ Then start typing the name of the symbol.
 Fuzzy searching is supported.
 For example, searching for ``GcWin`` might match the symbol ``GcalWindow``.
 
-Filtering searches:
-You can narrow results prefixing searches with this keys:
+Press ``Up`` or ``Down`` arrows to move between the results.
+Press ``Enter`` to activate the search result and jump to the symbol.
+You can press ``Escape`` to return to the editor.
+
+.. note:: This feature requires that the ``code-index`` plugin is enabled.
+
+Filtering searches
+------------------
+
+You can narrow search results by prefixing searches with the following keys:
+
 - ``f`` for functions
 - ``v`` for variables
 - ``s`` for structs
@@ -19,9 +28,3 @@ You can narrow results prefixing searches with this keys:
 - ``c`` for class
 - ``a`` for constants
 - ``m`` for macros
-
-Press ``Up`` or ``Down`` arrows to move between the results.
-Press ``Enter`` to activate the search result and jump to the symbol.
-You can press ``Escape`` to return to the editor.
-
-.. note:: This feature requires that the ``code-index`` plugin is enabled.