parser: Use #-space-% to allow writing PEP8-compliant Python code (OS…

…Geo#1287)

Accept '# %' in parser script header definition because '#%' is against PEP8
(each line of a block comment starts with a # and a single space).

'#%' is still supported and documented as backwards compatibility.

All documentation and generated code uses the new '# %'.

Changes '#%' to '# %' for modules in scripts, gui, and temporal.

doc/gui/wxpython/example/g.gui.example.py

@@ -18,16 +18,16 @@
 #
 ############################################################################
 
-#%module
-#% description: Example GUI application which displays raster map and further information
-#% keyword: example
-#% keyword: GUI
-#% keyword: raster
-#%end
-#%option G_OPT_R_INPUT
-#% description: Name of raster map to load
-#% required: no
-#%end
+# %module
+# % description: Example GUI application which displays raster map and further information
+# % keyword: example
+# % keyword: GUI
+# % keyword: raster
+# %end
+# %option G_OPT_R_INPUT
+# % description: Name of raster map to load
+# % required: no
+# %end
 
 import os
 import sys

doc/python/m.distance.py

@@ -23,26 +23,26 @@
 # Requires Numeric module (NumPy) from  http://numpy.scipy.org/
 #
 
-#%module
-#% label: Finds the distance between two or more points.
-#% description: If the projection is latitude-longitude, this distance is measured along the geodesic.
-#% keyword: miscellaneous
-#% keyword: distance
-#% keyword: measure
-#%end
-#%option
-#% key: coord
-#% type: string
-#% required: yes
-#% multiple: yes
-#% key_desc: easting,northing
-#% description: Comma separated list of coordinate pairs
-#%end
-#%flag
-#% key: i
-#% description: Read coordinate pairs from stdin
-#% suppress_required: yes
-#%end
+# %module
+# % label: Finds the distance between two or more points.
+# % description: If the projection is latitude-longitude, this distance is measured along the geodesic.
+# % keyword: miscellaneous
+# % keyword: distance
+# % keyword: measure
+# %end
+# %option
+# % key: coord
+# % type: string
+# % required: yes
+# % multiple: yes
+# % key_desc: easting,northing
+# % description: Comma separated list of coordinate pairs
+# %end
+# %flag
+# % key: i
+# % description: Read coordinate pairs from stdin
+# % suppress_required: yes
+# %end
 
 import os, sys
 

doc/python/script/r.example.py

@@ -1,15 +1,15 @@
 #!/usr/bin/env python3
 
-#%module
-#% description: Selects values from raster above value of mean plus standard deviation
-#% keyword: raster
-#% keyword: select
-#% keyword: standard deviation
-#%end
-#%option G_OPT_R_INPUT
-#%end
-#%option G_OPT_R_OUTPUT
-#%end
+# %module
+# % description: Selects values from raster above value of mean plus standard deviation
+# % keyword: raster
+# % keyword: select
+# % keyword: standard deviation
+# %end
+# %option G_OPT_R_INPUT
+# %end
+# %option G_OPT_R_OUTPUT
+# %end
 
 
 import sys