helper-blocks: fix pre formatting only for auth plugin helper texts.

- leave other as they can break if we apply same for all helper blocks.

rhodecode/public/css/main-content.less

@@ -61,8 +61,10 b''
     .help-block {
         display: block;
         margin-left: @label-width;
+        &.pre-formatting {
         white-space: pre;
     }
+    }
 
     .action_button {
         color: @grey4;

rhodecode/templates/admin/auth/plugin_settings.mako

@@ -72,7 +72,7 b''
                           <span class="error-message">${errors.get(node.name)}</span>
                           <br />
                         %endif
-                        <p class="help-block">${node.description}</p>
+                        <p class="help-block pre-formatting">${node.description}</p>
                       </div>
                     </div>
                   %endfor

rhodecode/templates/admin/repos/repo_edit_vcs.mako

@@ -10,9 +10,7 b''
                     </div>
                     <div class="checkboxes">
                         ${h.checkbox('inherit_global_settings',value=True)}
-                        <span class="help-block">
-                          ${h.literal(_('Select to inherit global vcs settings.'))}
-                        </span>
+                        <span class="help-block">${h.literal(_('Select to inherit global vcs settings.'))}</span>
                     </div>
                 </div>
             </div>

rhodecode/templates/login.mako

@@ -71,7 +71,6 b''
                         </p>
                             %endif
                     
-
                     ${h.submit('sign_in', _('Sign In'), class_="btn sign-in")}
 
                 ${h.end_form()}

rhodecode/templates/pullrequests/pullrequest.mako

@@ -48,9 +48,7 b''
                             </div>
                             <div class="textarea text-area editor">
                                 ${h.textarea('pullrequest_desc',size=30, )}
-                                <span class="help-block">
-                                    ${_('Write a short description on this pull request')}
-                                </span>
+                                <span class="help-block">${_('Write a short description on this pull request')}</span>
                             </div>
                         </div>