re PR target/92055 ([avr] Support 64-bit double)

	PR target/92055
	* config/avr/avr.opt (-mdouble=, -mlong-double=):
	Fix a missing '-' when displaying these options in the
	help screen.

From-SVN: r277954

gcc/ChangeLog

+2019-11-08  Georg-Johann Lay  <avr@gjlay.de>
+
+	PR target/92055
+	* config/avr/avr.opt (-mdouble=, -mlong-double=):
+	Fix a missing '-' when displaying these options in the
+	help screen.
+
 2019-11-08  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* config/aarch64/iterators.md (SVE_BH, SVE_BHS): Delete.
@@ -411,7 +418,7 @@
 	(HAVE_DOUBLE_MULTILIB, HAVE_LONG_DOUBLE_MULTILIB): New variables.
 	Pass them down to...
 	* config/avr/genmultilib.awk: ...here and handle them.
-	* gcc/config/avr/avr.opt (-mdouble=, avr_double). New option and var.
+	* config/avr/avr.opt (-mdouble=, avr_double). New option and var.
 	(-mlong-double=, avr_long_double). New option and var.
 	* common/config/avr/avr-common.c (opts.h, diagnostic.h): Include.
 	(TARGET_OPTION_OPTIMIZATION_TABLE) <-mdouble=, -mlong-double=>:

gcc/config/avr/avr.opt

@@ -117,11 +117,11 @@ Assume that all data in static storage can be accessed by LDS / STS.  This optio
 
 mdouble=
 Target Report Joined RejectNegative Var(avr_double) Init(0) Enum(avr_bits_e)
-mdouble=<BITS>	Use <BITS> bits wide double type.
+-mdouble=<BITS>	Use <BITS> bits wide double type.
 
 mlong-double=
 Target Report Joined RejectNegative Var(avr_long_double) Init(0) Enum(avr_bits_e)
-mlong-double=<BITS>	Use <BITS> bits wide long double type.
+-mlong-double=<BITS>	Use <BITS> bits wide long double type.
 
 nodevicelib
 Driver Target Report RejectNegative