test cache: use .bin extension, fix .gitignore .gitattributes

.gitattributes

@@ -8,6 +8,6 @@
 *.PDF	binary
 *.png	binary
 *.jpg	binary
-
+*.bin   binary
 
 .git_archival.txt  export-subst

.gitignore

@@ -35,7 +35,6 @@ log/
 /*.qdf
 *.ipynb
 .ipynb_checkpoints/
-tests/cache/
 tests/output/
 tests/resources/private/
 tmp/

tests/spoof/tesseract_cache.py

@@ -136,7 +136,8 @@ def main():
             for configfile in args.configfiles:
                 # cp cache -> output
                 tessfile = args.outputbase + '.' + configfile
-                shutil.copy(str(cache_folder / configfile), tessfile)
+                shutil.copy(str(cache_folder / configfile + '.bin'), 
+                            tessfile)
         sys.exit(0)
 
     # Cache miss
@@ -166,7 +167,7 @@ def main():
                 continue
             # cp pwd/{outputbase}.{configfile} -> {cache}/{configfile}
             tessfile = args.outputbase + '.' + configfile
-            shutil.copy(tessfile, str(cache_folder / configfile))
+            shutil.copy(tessfile, str(cache_folder / configfile + '.bin'))
 
     (cache_folder / 'stderr').write_bytes(p.stderr)