X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=folly%2Fdocs%2FFormat.md;h=74192058abc00c496fae81e0367c83feaeae1b6d;hb=ff878dc12e3f7d7234f21b0b4b3251595c031b4c;hp=5696c8be0b28d150201c24d1a8a5e38f12de91d4;hpb=4460753ff370dce64791167e2afd3824ea6a1c57;p=folly.git

diff --git a/folly/docs/Format.md b/folly/docs/Format.md
index 5696c8be..74192058 100644
--- a/folly/docs/Format.md
+++ b/folly/docs/Format.md
@@ -124,7 +124,7 @@ Format string (`vformat`):
 - `format_spec`: format specification, see below
 
 Format specification:
-`[[fill] align] [sign] ["#"] ["0"] [width] [","] ["." precision] [type]`
+`[[fill] align] [sign] ["#"] ["0"] [width] [","] ["." precision] ["."] [type]`
 
 - `fill` (may only be specified if `align` is also specified): pad with this
   character ('` `' (space) or '`0`' (zero) might be useful; space is default)
@@ -149,6 +149,8 @@ Format specification:
     - for floating point values, number of digits after decimal point ('`f`' or
       '`F`' presentation) or number of significant digits ('`g`' or '`G`')
     - for others, maximum field size (truncate subsequent characters)
+- '`.`' (when used after precision or in lieu of precison): Forces a trailing
+  decimal point to make it clear this is a floating point value.
 - `type`: presentation format, see below
 
 Presentation formats:
@@ -189,4 +191,3 @@ You can extend `format` for your own class by providing a specialization for
 `folly::FormatValue`.  See `folly/Format.h` and `folly/FormatArg.h` for
 details, and the existing specialization for `folly::dynamic` in
 `folly/dynamic-inl.h` for an implementation example.
-