diff --git a/manual/conversion.rst b/manual/conversion.rst
index 83ecd88a27..aa2c75b5d4 100644
--- a/manual/conversion.rst
+++ b/manual/conversion.rst
@@ -325,11 +325,15 @@ remove all non-breaking-space entities, or may include false positive matches re
     will re-number the heading tags to prevent splitting.
 
 :guilabel:`Delete blank lines between paragraphs`
-    This option will cause calibre to analyze blank lines included within the document.  If every paragraph is interleaved
-    with a blank line, then calibre will remove all those blank paragraphs.  Sequences of multiple blank lines will be
-    considered scene breaks and retained as a single paragraph.  This option differs from the 'Remove Paragraph Spacing'
-    option under 'Look and Feel' in that it actually modifies the HTML content, while the other option modifies the document
-    styles.  This option can also remove paragraphs which were inserted using calibre's 'Insert blank line' option.
+    This option will cause calibre to analyze blank lines included within the
+    document.  If every paragraph is interleaved with a blank line, then
+    calibre will remove all those blank paragraphs.  Sequences of multiple
+    blank lines will be considered scene breaks and retained as a single
+    paragraph. This option differs from the :guilabel:`Remove paragraph
+    spacing` option under :guilabel:`Look and Feel` in that it actually
+    modifies the HTML content, while the other option modifies the document
+    styles.  This option can also remove paragraphs which were inserted using
+    calibre's :guilabel:`Insert blank line` option.
 
 :guilabel:`Ensure scene breaks are consistently formatted`
     With this option calibre will attempt to detect common scene-break markers and ensure that they are center aligned.
diff --git a/manual/plugins.rst b/manual/plugins.rst
index 8e1459ce98..35e5c8594a 100644
--- a/manual/plugins.rst
+++ b/manual/plugins.rst
@@ -153,7 +153,7 @@ from its bases, documented below. A typical basic USBMS based driver looks like
    :members:
    :member-order: bysource
 
-User Interface Actions
+User Interface actions
 --------------------------
 
 If you are adding your own plugin in a ZIP file, you should subclass both InterfaceActionBase and InterfaceAction. The
diff --git a/src/calibre/gui2/dialogs/plugin_updater.py b/src/calibre/gui2/dialogs/plugin_updater.py
index 9f6ea864c7..522cc77d58 100644
--- a/src/calibre/gui2/dialogs/plugin_updater.py
+++ b/src/calibre/gui2/dialogs/plugin_updater.py
@@ -717,7 +717,7 @@ class PluginUpdaterDialog(SizePersistedDialog):
             self.gui.status_bar.showMessage(_('Plugin installed: %s') % display_plugin.name)
             d = info_dialog(self.gui, _('Success'),
                     _('Plugin <b>{0}</b> successfully installed under <b>'
-                        ' {1} plugins</b>. You may have to restart calibre '
+                        '{1}</b>. You may have to restart calibre '
                         'for the plugin to take effect.').format(plugin.name, plugin.type),
                     show_copy_button=False)
             b = d.bb.addButton(_('&Restart calibre now'), QDialogButtonBox.ButtonRole.AcceptRole)
diff --git a/src/calibre/gui2/preferences/plugins.py b/src/calibre/gui2/preferences/plugins.py
index 75746fe2ad..c3dc31b40c 100644
--- a/src/calibre/gui2/preferences/plugins.py
+++ b/src/calibre/gui2/preferences/plugins.py
@@ -324,7 +324,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
             self.check_for_add_to_toolbars(plugin, previously_installed=plugin.name in installed_plugins)
             info_dialog(self, _('Success'),
                     _('Plugin <b>{0}</b> successfully installed under <b>'
-                        '{1} plugins</b>. You may have to restart calibre '
+                        '{1}</b>. You may have to restart calibre '
                         'for the plugin to take effect.').format(plugin.name, plugin.type),
                     show=True, show_copy_button=False)
             idx = self._plugin_model.plugin_to_index_by_properties(plugin)