Trim trailing whitespace

Author: thejpster

src/doc/rustc/src/platform-support/armv7a-none-eabi.md

@@ -26,7 +26,7 @@ See [`arm-none-eabi`](arm-none-eabi.md) for information applicable to all
 
 All Armv7-A processors include an FPU (a VFPv3 or a VFPv4). The difference
 between the `-eabi` and `-eabihf` targets is whether the FPU is used for
-passing function arguments. You may prefer the `-eabi` soft-float target when 
+passing function arguments. You may prefer the `-eabi` soft-float target when
 
 When using the hardfloat targets, the minimum floating-point features assumed
 are those of the `vfpv3-d16`, which includes single- and double-precision,