add a fprettify style file

For a more consistent code formatting in the snippets of Fortran,
a fprettify style file was added.  On occasion, its results will
be overridden though; eventually, it will be removed, too.

Signed-off-by: Norwid Behrnd <[email protected]>

Author: nbehrnd

source/learn/f95_features/fprettify.rc

@@ -0,0 +1,36 @@
+# style configuration file for fprettify
+# original source: https://github.com/PHOTOX/ABIN/blob/master/.fprettify.rc
+# original author: Daniel Hollas
+# original licence: GPL v3
+#
+# minor edits to the original to fit better the pattern other booklets use
+
+# Replace Fortran-style relational operators with C-style
+# to make our code more readable for non-Fortran programmers
+# for example '.lt.' to '<'
+enable-replacements=False  # in the original: True
+c-relations=False  # in the original: True
+
+# White space settings
+indent=2  # in the original 3
+line-length=132
+strict-indent=True
+strip-comments=True
+whitespace-relational=True
+whitespace-logical=True
+whitespace-plusminus=True
+whitespace-multdiv=True
+whitespace-comma=True
+whitespace-intrinsics=True
+whitespace-print=False
+whitespace-type=False
+
+# Control whitespace around '::' declarations
+whitespace-decl=True
+enable-decl=False  # in the original: True (then lines shrink)
+
+# Don't indent pre-processor statements
+disable-fypp=True
+
+case=[1,1,1,2]
+exclude=[random.F90,fftw3.F90,force_cp2k.F90, h2o_schwenke.f, h2o_cvrqd.f]