Rename files containing underscores.

src/powers-ten.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // ------------ GENERATED FILE ----------------
 // command used:
-//  tools/generate-ten-powers --from -308 --to 342 --mantissa-size 64 --round round -o src/powers_ten.h  // NOLINT
+//  tools/generate-ten-powers --from -308 --to 342 --mantissa-size 64 --round round -o src/powers-ten.h  // NOLINT
 
 // This file is intended to be included inside another .h or .cc files
 // with the following defines set:
 //  GRISU_CACHE_STRUCT: should expand to the name of a struct that will
 //   hold the cached powers of ten. Each entry will hold a 64-bit
 //   significand, a 16-bit signed binary exponent, and a 16-bit
 //   signed decimal exponent. Each entry will be constructed as follows:
 //      { significand, binary_exponent, decimal_exponent }.
 //  GRISU_CACHE_NAME(i): generates the name for the different caches.
 //   The parameter i will be a number in the range 1-20. A cache will
@@ skipping 2437 matching lines @@
   {GRISU_UINT64_C(0xce1de406, 42e3f4b9), 707, 232},
   {GRISU_UINT64_C(0x8bab8eef, b6409c1a), 774, 252},
   {GRISU_UINT64_C(0xbd49d14a, a79dbc82), 840, 272},
   {GRISU_UINT64_C(0x80444b5e, 7aa7cf85), 907, 292},
   {GRISU_UINT64_C(0xadd57a27, d29339f6), 973, 312},
   {GRISU_UINT64_C(0xeb96bf6e, badf77d9), 1039, 332},
   };
 static const int GRISU_CACHE_MAX_DISTANCE(20) = 67;
 // nb elements (20): 33
 static const int GRISU_CACHE_OFFSET = 308;