Make google-java-format stop using "assert." Use Preconditions instead.

mkanat · ronshapiro · commit fff0337a703e · 2018-02-15T16:46:36.000-05:00
------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=185773132
diff --git a/core/src/main/java/com/google/googlejavaformat/java/ImportOrderer.java b/core/src/main/java/com/google/googlejavaformat/java/ImportOrderer.java
@@ -17,6 +17,7 @@
 
 import com.google.common.base.CharMatcher;
 import com.google.common.base.Optional;
+import com.google.common.base.Preconditions;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.ImmutableSortedSet;
@@ -242,7 +243,7 @@ private ImportsAndIndex scanImports(int i) throws FormatterException {
 
   // Produces the sorted output based on the imports we have scanned.
   private String reorderedImportsString(ImmutableSortedSet<Import> imports) {
-    assert !imports.isEmpty();
+    Preconditions.checkArgument(!imports.isEmpty(), "imports");
 
     Import firstImport = imports.iterator().next();
 
