...

src/calibre/customize/builtins.py

@@ -92,7 +92,7 @@ class TXT2TXTZ(FileTypePlugin):
         'containing Markdown or Textile references to images. The referenced '
         'images as well as the TXT file are added to the archive.')
     version = numeric_version
-    file_types = set(['txt'])
+    file_types = set(['txt', 'text'])
     supported_platforms = ['windows', 'osx', 'linux']
     on_import = True
 

src/calibre/ebooks/txt/input.py

@@ -65,7 +65,6 @@ class TXTInput(InputFormatPlugin):
         txt = ''
         log.debug('Reading text from file...')
         length = 0
-        # [(u'path', mime),]
 
         # Extract content from zip archive.
         if file_ext == 'txtz':
@@ -73,7 +72,7 @@ class TXTInput(InputFormatPlugin):
             zf.extractall('.')
 
             for x in walk('.'):
-                if os.path.splitext(x)[1].lower() == '.txt':
+                if os.path.splitext(x)[1].lower() in ('.txt', '.text'):
                     with open(x, 'rb') as tf:
                         txt += tf.read() + '\n\n'
         else:

src/calibre/gui2/__init__.py

@@ -340,6 +340,7 @@ class FileIconProvider(QFileIconProvider):
              'rar'     : 'rar',
              'zip'     : 'zip',
              'txt'     : 'txt',
+             'text'    : 'txt',
              'prc'     : 'mobi',
              'azw'     : 'mobi',
              'mobi'    : 'mobi',