Move the overloads of CommandLine#concat() next to each other.

RELNOTES: None.
PiperOrigin-RevId: 217836884

src/main/java/com/google/devtools/build/lib/actions/CommandLine.java

diff --git a/src/main/java/com/google/devtools/build/lib/actions/CommandLine.java b/src/main/java/com/google/devtools/build/lib/actions/CommandLine.java
index 114e7b0..b87e5a6 100644
--- a/src/main/java/com/google/devtools/build/lib/actions/CommandLine.java
+++ b/src/main/java/com/google/devtools/build/lib/actions/CommandLine.java
@@ -104,18 +104,6 @@
     }
   }
 
-  /**
-   * Returns a {@link CommandLine} that is constructed by prepending the {@code executableArgs} to
-   * {@code commandLine}.
-   */
-  public static CommandLine concat(
-      final ImmutableList<String> executableArgs, final CommandLine commandLine) {
-    if (executableArgs.isEmpty()) {
-      return commandLine;
-    }
-    return new PrefixedCommandLine(executableArgs, commandLine);
-  }
-
   @AutoCodec
   @VisibleForSerialization
   static class SuffixedCommandLine extends CommandLine {
@@ -141,6 +129,18 @@
   }
 
   /**
+   * Returns a {@link CommandLine} that is constructed by prepending the {@code executableArgs} to
+   * {@code commandLine}.
+   */
+  public static CommandLine concat(
+      final ImmutableList<String> executableArgs, final CommandLine commandLine) {
+    if (executableArgs.isEmpty()) {
+      return commandLine;
+    }
+    return new PrefixedCommandLine(executableArgs, commandLine);
+  }
+
+  /**
    * Returns a {@link CommandLine} that is constructed by appending the {@code args} to {@code
    * commandLine}.
    */