- `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)
- 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:
`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.
-