[NFC] Fix early line-break in doxygen comment

Author: frasercrmck

llvm/include/llvm/CodeGen/ISDOpcodes.h

@@ -347,9 +347,8 @@ enum NodeType {
   USHLSAT,
 
   /// RESULT = [US]MULFIX(LHS, RHS, SCALE) - Perform fixed point multiplication
-  /// on
-  /// 2 integers with the same width and scale. SCALE represents the scale of
-  /// both operands as fixed point numbers. This SCALE parameter must be a
+  /// on 2 integers with the same width and scale. SCALE represents the scale
+  /// of both operands as fixed point numbers. This SCALE parameter must be a
   /// constant integer. A scale of zero is effectively performing
   /// multiplication on 2 integers.
   SMULFIX,