diff --git a/manual/metadata.rst b/manual/metadata.rst
index 4e7bf17a71..670849a0f4 100644
--- a/manual/metadata.rst
+++ b/manual/metadata.rst
@@ -52,7 +52,7 @@ The normal edit metadata dialog also has :guilabel:`Next` and :guilabel:`Previou
 Search and replace
 ^^^^^^^^^^^^^^^^^^^^
 
-The :guilabel:`Bulk metadata edit` dialog allows you to perform arbitrarily powerful search and replace operations on the selected books. By default it uses a simple text search and replace, but it also support *regular expressions*. For more on regular expressions, see :ref:`regexptutorial`.
+The :guilabel:`Edit metadata for many books` dialog allows you to perform arbitrarily powerful search and replace operations on the selected books. By default it uses a simple text search and replace, but it also support *regular expressions*. For more on regular expressions, see :ref:`regexptutorial`.
 
 As noted above, there are two search and replace modes: character match and regular expression. Character match will look in the `Search field` you choose for the characters you type in the `search for` box and replace those characters with what you type in the `replace with` box. Each occurrence of the search characters in the field will be replaced. For example, assume the field being searched contains `a bad cat`. If you search for `a` to be replaced with `HELLO`, then the result will be `HELLO bHELLOd cHELLOt`.
 
diff --git a/manual/viewer.rst b/manual/viewer.rst
index 6480df40cd..5d563fba48 100644
--- a/manual/viewer.rst
+++ b/manual/viewer.rst
@@ -62,7 +62,7 @@ Table of Contents
 ^^^^^^^^^^^^^^^^^^^^
 
 If the book you are reading defines a Table of Contents, you can access it by
-pressing the :guilabel:`Table of Contents` button.  This will bring up a list
+pressing the :guilabel:`Table of Contents` button. This will bring up a list
 of sections in the book. You can click on any of them to jump to that portion
 of the book.
 
diff --git a/src/calibre/ebooks/conversion/plugins/txt_input.py b/src/calibre/ebooks/conversion/plugins/txt_input.py
index 1636839281..2d35235431 100644
--- a/src/calibre/ebooks/conversion/plugins/txt_input.py
+++ b/src/calibre/ebooks/conversion/plugins/txt_input.py
@@ -87,9 +87,9 @@ class TXTInput(InputFormatPlugin):
             help=_('Normally extra space at the beginning of lines is retained. '
                    'With this option they will be removed.')),
         OptionRecommendation(name="markdown_extensions", recommended_value='footnotes, tables, toc',
-            help=_('Enable extensions to markdown syntax. Extensions are formatting that is not part '
-                   'of the standard markdown format. The extensions enabled by default: %default.\n'
-                   'To learn more about markdown extensions, see {}\n'
+            help=_('Enable extensions to Markdown syntax. Extensions are formatting that is not part '
+                   'of the standard Markdown format. The extensions enabled by default: %default.\n'
+                   'To learn more about Markdown extensions, see {}\n'
                    'This should be a comma separated list of extensions to enable:\n'
                    ).format('https://python-markdown.github.io/extensions/') + '\n'.join('* %s: %s' % (k, MD_EXTENSIONS[k]) for k in sorted(MD_EXTENSIONS))),
     }