Restructure and deduplicate table.code styling

app/assets/stylesheets/pages/diff.scss

@@ -89,132 +89,6 @@
       }
     }
-    table.code {
-      width: 100%;
-      font-family: $monospace-font;
-      border: 0;
-      border-collapse: separate;
-      margin: 0;
-      padding: 0;
-      table-layout: fixed;
-      border-radius: 0 0 $border-radius-default $border-radius-default;
-
-      .diff-line-num {
-        width: 50px;
-        position: relative;
-
-        a {
-          transition: none;
-        }
-      }
-
-      .line_holder td {
-        line-height: $code-line-height;
-        font-size: $code-font-size;
-        vertical-align: top;
-
-        &.noteable_line {
-          position: relative;
-        }
-
-        span {
-          white-space: pre-wrap;
-
-          &.context-cell {
-            display: inline-block;
-            width: 100%;
-            height: 100%;
-          }
-        }
-
-        .line {
-          word-wrap: break-word;
-        }
-      }
-
-      &.left-side-selected {
-        td.line_content.parallel.right-side {
-          user-select: none;
-        }
-      }
-
-      &.right-side-selected {
-        td.line_content.parallel.left-side {
-          user-select: none;
-        }
-      }
-    }
-
-    tr.line_holder.parallel {
-      td.line_content.parallel {
-        width: 46%;
-      }
-
-      .add-diff-note {
-        margin-left: -55px;
-      }
-    }
-
-    .old_line,
-    .new_line {
-      user-select: none;
-      margin: 0;
-      border: 0;
-      padding: 0 5px;
-      border-right: 1px solid;
-      text-align: right;
-      min-width: 35px;
-      max-width: 50px;
-      width: 35px;
-
-      a {
-        float: left;
-        width: 35px;
-        font-weight: $gl-font-weight-normal;
-
-        &[disabled] {
-          cursor: default;
-
-          &:hover,
-          &:active {
-            text-decoration: none;
-          }
-        }
-      }
-    }
-
-    .line_content {
-      display: block;
-      margin: 0;
-      padding: 0 1.5em;
-      border: 0;
-      position: relative;
-
-      &.parallel {
-        display: table-cell;
-
-        span {
-          word-break: break-all;
-        }
-      }
-
-      &.old {
-        &::before {
-          content: '-';
-          position: absolute;
-          left: 0.5em;
-        }
-      }
-
-      &.new {
-        &::before {
-          content: '+';
-          position: absolute;
-          left: 0.5em;
-        }
-      }
-    }
-
     .diff-loading-error-block {
       padding: $gl-padding * 2 $gl-padding;
       text-align: center;
@@ -437,10 +311,6 @@
     }
   }
-  .line_content {
-    white-space: pre-wrap;
-  }
-
   .diff-file-container {
     .frame.deleted {
       border: 1px solid $deleted;
@@ -502,6 +372,114 @@
   }
 }
+table.code {
+  width: 100%;
+  font-family: $monospace-font;
+  border: 0;
+  border-collapse: separate;
+  margin: 0;
+  padding: 0;
+  table-layout: fixed;
+  border-radius: 0 0 $border-radius-default $border-radius-default;
+
+  tr.line_holder td {
+    line-height: $code-line-height;
+    font-size: $code-font-size;
+    vertical-align: top;
+
+    span {
+      white-space: pre-wrap;
+
+      &.context-cell {
+        display: inline-block;
+        width: 100%;
+        height: 100%;
+      }
+
+      &.line {
+        word-wrap: break-word;
+      }
+    }
+
+    &.diff-line-num {
+      user-select: none;
+      margin: 0;
+      border: 0;
+      padding: 0 10px 0 5px;
+      border-right: 1px solid;
+      text-align: right;
+      width: 50px;
+      position: relative;
+
+      a {
+        transition: none;
+        float: left;
+        width: 100%;
+        font-weight: $gl-font-weight-normal;
+
+        &[disabled] {
+          cursor: default;
+
+          &:hover,
+          &:active {
+            text-decoration: none;
+          }
+        }
+      }
+
+      &:not(.js-unfold-bottom) a::before {
+        content: attr(data-linenumber);
+      }
+    }
+
+    &.line_content {
+      display: block;
+      margin: 0;
+      padding: 0 1.5em;
+      border: 0;
+      position: relative;
+      white-space: pre-wrap;
+
+      &.parallel {
+        display: table-cell;
+        width: 46%;
+
+        span {
+          word-break: break-all;
+        }
+      }
+
+      &.old {
+        &::before {
+          content: '-';
+          position: absolute;
+          left: 0.5em;
+        }
+      }
+
+      &.new {
+        &::before {
+          content: '+';
+          position: absolute;
+          left: 0.5em;
+        }
+      }
+    }
+  }
+
+  &.left-side-selected {
+    td.line_content.parallel.right-side {
+      user-select: none;
+    }
+  }
+
+  &.right-side-selected {
+    td.line_content.parallel.left-side {
+      user-select: none;
+    }
+  }
+}
+
 .diff-stats {
   align-items: center;
   padding: 0 0.25rem;
@@ -602,16 +580,6 @@
   }
 }
-.file-holder {
-  .diff-line-num:not(.js-unfold-bottom) {
-    a {
-      &::before {
-        content: attr(data-linenumber);
-      }
-    }
-  }
-}
-
 .diff-comment-avatar-holders {
   position: absolute;
   height: 19px;

app/assets/stylesheets/pages/notes.scss

@@ -736,7 +736,7 @@ $note-form-margin-left: 72px;
 .add-diff-note {
   @include btn-comment-icon;
   opacity: 0;
-  margin-left: -55px;
+  margin-left: -50px;
   position: absolute;
   top: 50%;
   transform: translateY(-50%);