fix indefinite articles

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

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!