fix indefinite articles

Signed-off-by: dartcafe <github@dartcafe.de>

admin_manual/installation/nginx.rst

@@ -123,7 +123,7 @@ Upload of files greater than 10 MiB fails
 
 If you configure nginx (globally) to block all requests to (hidden) dot files,
 it may be not possible to upload files greater than 10 MiB using the webpage
-due to Nextclouds requirement to upload the file to an url ending with ``/.file``.
+due to Nextclouds requirement to upload the file to a URL ending with ``/.file``.
 
 You may require to change:
 

developer_manual/app_development/info.rst

@@ -180,20 +180,20 @@ author
     * required
     * can occur multiple times with different authors
     * can contain a **mail** attribute which must be an email
-    * can contain a **homepage** which must be an URL
+    * can contain a **homepage** which must be a URL
     * will not (yet) be rendered on the App Store
     * will be provided through the REST API
 documentation/user
     * optional
-    * must contain an URL to the user documentation
+    * must contain a URL to the user documentation
     * will be rendered on the app detail page
 documentation/admin
     * optional
-    * must contain an URL to the admin documentation
+    * must contain a URL to the admin documentation
     * will be rendered on the app detail page
 documentation/developer
     * optional
-    * must contain an URL to the developer documentation
+    * must contain a URL to the developer documentation
     * will be rendered on the app detail page
 category
     * optional
@@ -219,20 +219,20 @@ category
     * can occur more than once with different categories
 website
     * optional
-    * must contain an URL to the project's homepage
+    * must contain a URL to the project's homepage
     * will be rendered on the app detail page
 discussion
     * optional
-    * must contain an URL to the project's discussion page/forum
+    * must contain a URL to the project's discussion page/forum
     * will be rendered on the app detail page as the "ask question or discuss" button
     * if absent, it will default to our forum at https://help.nextcloud.com/ and create a new category in the apps category
 bugs
     * required
-    * must contain an URL to the project's bug tracker
+    * must contain a URL to the project's bug tracker
     * will be rendered on the app detail page
 repository
     * optional
-    * must contain an URL to the project's repository
+    * must contain a URL to the project's repository
     * can contain a **type** attribute, **git**, **mercurial**, **subversion** and **bzr** are allowed values, defaults to **git**
     * currently not used
 screenshot

developer_manual/basics/events.rst

@@ -431,7 +431,7 @@ This event is triggered when an app is disabled.
 
 .. versionadded:: 20
 
-Emitted before the rendering step of each TemplateResponse. The event holds a flag that specifies if an user is logged in.
+Emitted before the rendering step of each TemplateResponse. The event holds a flag that specifies if a user is logged in.
 
 ``\OCP\Authentication\Events\LoginFailedEvent``
 ***********************************************

developer_manual/client_apis/LoginFlow/index.rst

@@ -16,7 +16,7 @@ Opening the webview
 The client should open a webview to :code:`<server>/index.php/login/flow`. Be sure to set the :code:`OCS-APIREQUEST`
 header to :code:`true`.
 
-The client will register an URL handler to catch urls of the :code:`nc` protocol. This is required to obtain the
+The client will register a URL handler to catch urls of the :code:`nc` protocol. This is required to obtain the
 credentials in the final stage.
 
 This should be a one time webview. Which means:

developer_manual/client_apis/OCS/ocs-api-overview.rst

@@ -181,7 +181,7 @@ This when the primary color is e.g. set to ``#000000`` the ``color-elemenet-dark
 Text and icons on these elements should use ``color-text``.
 
 
-The background value can either be an URL to the background image or a hex color value.
+The background value can either be a URL to the background image or a hex color value.
 
 Direct Download
 ---------------

developer_manual/prologue/security.rst

@@ -103,7 +103,7 @@ It may also be wise to choose a proper JavaScript framework like AngularJS which
 Clickjacking
 ------------
 
-`Clickjacking <https://en.wikipedia.org/wiki/Clickjacking>`_ tricks the user to click into an invisible iframe to perform an arbitrary action (e.g. delete an user account)
+`Clickjacking <https://en.wikipedia.org/wiki/Clickjacking>`_ tricks the user to click into an invisible iframe to perform an arbitrary action (e.g. delete a user account)
 
 To prevent such attacks Nextcloud sends the `X-Frame-Options` header to all template responses. Don't remove this header if you don't really need it!
 

user_manual/groupware/calendar.rst

@@ -93,7 +93,7 @@ There's also an « embedding code » that provides an HTML iframe to embed you
 Multiple calendars can be shared together by adding their unique tokens to the end of an embed link. Individual tokens can be found at the end of each calendar's public link. The full address will look like
 ``https://cloud.example.com/index.php/apps/calendar/embed/<token1>-<token2>-<token3>``
 
-To change the default view or date of an embedded calendar, you need to provide an URL that looks like ``https://cloud.example.com/index.php/apps/calendar/embed/<token>/<view>/<date>``.
+To change the default view or date of an embedded calendar, you need to provide a URL that looks like ``https://cloud.example.com/index.php/apps/calendar/embed/<token>/<view>/<date>``.
 In this url you need to replace the following variables:
 
 - ``<token>`` with the calendar's token,

user_manual/groupware/sync_thunderbird.rst

@@ -83,7 +83,7 @@ The old method: Manually subscribing to calendars
 
 This method is only needed if you don't want to install TBSync.
 
-#. Go to your Nextcloud Calendar and click on the 3 dots menu for the calendar that you want to synchronize which will display an URL that looks something like this:
+#. Go to your Nextcloud Calendar and click on the 3 dots menu for the calendar that you want to synchronize which will display a URL that looks something like this:
 
    ``https://cloud.nextcloud.com/remote.php/dav/calendars/daniel/personal/``