Wording and grammar tweak

riscv-elf.adoc

@@ -1137,8 +1137,8 @@ specification versions are merged.
 
 === Mapping Symbol
 
-Section can have a mixture of code and data or code with different ISAs,
-mapping symbol is a special symbol class used for describe the boundaries.
+The section can have a mixture of code and data or code with different ISAs;
+mapping symbol is a special symbol class used to describe the boundaries.
 
 [%autowidth]
 |===
@@ -1148,28 +1148,30 @@ mapping symbol is a special symbol class used for describe the boundaries.
 | $x<ISA>     | Start of a sequence of instructions with <ISA> extension.
 |===
 
-Mapping symbol for data(`$d`) means following region are data.
+The mapping symbol for data(`$d`) means the following region is data.
 
-Mapping symbol for instruction(`$x`) means following region are instructions,
-and it has an optional ISA string, which means following code region are using
-ISA different than the ISA recorded in arch attribute, the ISA information will
-used until next instruction mapping symobl; an instruction mapping symobl
-without ISA string means using ISA configuration from ELF attribute.
+The mapping symbol for instruction(`$x`) means the following region are
+instructions,
+and it has an optional ISA string, which means the following code regions are
+using ISA is different than the ISA recorded in the arch attribute;
+the ISA information will used until the next instruction mapping symbol;
+an instruction mapping symbol without ISA string means using ISA configuration
+from ELF attribute.
 
-Format and rule of the optional ISA string is same as Tag_RISCV_arch, must
+Format and rule of the optional ISA string are same as Tag_RISCV_arch, must
 having explicit version, more detailed rule please refer to <<Attributes>>.
 
-NOTE: The use case for mapping symbol for instruction(`$x`) with ISA information is
-used with ifunc, e.g. library are built with `rv64gc`, but few functions
-like memcpy provide two version, one built with `rv64gc`, and one built with
-`rv64gcv`, and select by ifunc mechanism at run-time; however the arch
-attribute is recording for minimal execution environment requirement, so the ISA
-information from arch attribute isn't enough for disassembler to disassemble the
-`rv64gcv` version correctly.
-
-NOTE: For toolchain implementation, linker are permit to merge the adjacency
-mapping symbol if they are exactly same type, and strip tool are permit to
-strip mapping symbol.
+NOTE: The use case for mapping symbol for instruction(`$x`) with ISA information
+is used with ifunc, e.g. libraries are built with `rv64gc`, but few functions
+like memcpy provides two versions, one built with `rv64gc`, and one built with
+`rv64gcv`, and select by ifunc mechanism at run-time; however, the arch
+attribute is recording for minimal execution environment requirements, so the
+ISA information from arch attribute is not enough for the disassembler to
+disassemble the `rv64gcv` version correctly.
+
+NOTE: For toolchain implementation, the linker is permitted to merge the
+adjacency mapping symbol if they are exactly the same symbol name, and strip
+tools are permitted to strip mapping symbol.
 
 == Linker Relaxation