script: improve a bit create-table.py and regenerate the Georgian charsets.

- Avoid trailing whitespaces.
- Print which tool and version were used for the generation (to help for
  future debugging in case of discrepancies between versions or
  implementations).

script/charsets/georgian-academy.py

@@ -50,7 +50,8 @@ language = \
     'incomplete': []
 }
 
-## Table generated by script/create-table.py with iconv ##
+## Table generated by script/create-table.py with: ##
+## iconv (Debian GLIBC 2.31-13+deb11u5) 2.31 ##
 # X0  X1  X2  X3  X4  X5  X6  X7  X8  X9  XA  XB  XC  XD  XE  XF   #
 charmap = \
 [

script/charsets/georgian-ps.py

@@ -50,7 +50,8 @@ language = \
     'incomplete': []
 }
 
-## Table generated by script/create-table.py with iconv ##
+## Table generated by script/create-table.py with: ##
+## iconv (Debian GLIBC 2.31-13+deb11u5) 2.31 ##
 # X0  X1  X2  X3  X4  X5  X6  X7  X8  X9  XA  XB  XC  XD  XE  XF   #
 charmap = \
 [

script/create-table.py

@@ -60,8 +60,22 @@ charset = charset[0]
 use_iconv = False
 try:
   b' '.decode(charset)
+  dec_version = 'Python {}'.format(sys.version).splitlines()[0]
 except LookupError:
   use_iconv = True
+  try:
+    call = subprocess.Popen(['iconv', '--version'],
+                             stdin=subprocess.PIPE, stdout=subprocess.PIPE,
+                             stderr=subprocess.DEVNULL)
+    if call.poll() is not None:
+      (_, error) = call.communicate(input='')
+      sys.stderr.write('Error: `iconv` ended with error "{}".\n'.format(error))
+      exit(1)
+    (dec_version, _) = call.communicate(input='')
+    dec_version = dec_version.decode('UTF-8').splitlines()[0]
+  except FileNotFoundError:
+    sys.stderr.write('Error: `iconv` is not installed.\n')
+    exit(1)
 
 def get_utf8_char(bchar, charset, iconv):
   if iconv:
@@ -90,7 +104,8 @@ def get_utf8_char(bchar, charset, iconv):
       # It would mean an illegal character.
       return None
 
-print('## Table generated by {} with {} ##'.format(script_path, 'iconv' if use_iconv else 'Python decode()'))
+print('## Table generated by {} with: ##'.format(script_path))
+print('## {} ##'.format(dec_version))
 
 print('# X0  X1  X2  X3  X4  X5  X6  X7  X8  X9  XA  XB  XC  XD  XE  XF   #')
 print('charmap = \\')