Hardcode path to Python executable

Before this change some commands would not work if `python` linked to a
recent version of Python (3.x) instead of the legacy version of Python
provided by Apple (2.x).

Author: sanssecours

Commands/Check Python Syntax.plist

@@ -11,7 +11,7 @@
 	<key>command</key>
 	<string>#!/bin/bash
 
-TPY=${TM_PYTHON:-python}
+TPY=${TM_PYTHON:-"/usr/bin/python"}
 
 "$TPY" "$TM_BUNDLE_SUPPORT/bin/pycheckmate.py" "$TM_FILEPATH"</string>
 	<key>fileCaptureRegister</key>

Commands/Documentation for Current Word.tmCommand

@@ -16,7 +16,7 @@ export TM_FIRST_LINE="$first_line"
 export PYTHONPATH="$TM_BUNDLE_SUPPORT/DocMate"
 export PYTHONPATH="$TM_SUPPORT_PATH/lib:$PYTHONPATH"
 
-/usr/bin/env python -S - <<PYTHON
+/usr/bin/python -S - <<PYTHON
 # coding: UTF-8
 import sys
 from sys import exit

Commands/Documentation in Browser.plist

@@ -7,7 +7,7 @@
 	<key>command</key>
 	<string>#!/bin/bash
 
-TPY=${TM_PYTHON:-python}
+TPY=${TM_PYTHON:-"/usr/bin/python"}
 
 echo '&lt;html&gt;&lt;body&gt;'
 "$TPY" "${TM_BUNDLE_SUPPORT}/browse_pydocs.py"