[PATCH v5 09/54] doc: correct grammar and formatting in ASan guide

[Stephen Hemminger <stephen@networkplumber.org>]

Correct several documentation issues:
- Change "Add below unit test code" to "Add the following unit test code"
- Change grammar in error descriptions to use proper subject-verb agreement
- Correct RST directive syntax from "Note::" to ".. Note::"

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
---
 doc/guides/prog_guide/asan.rst | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/doc/guides/prog_guide/asan.rst b/doc/guides/prog_guide/asan.rst
index 9a6c5a7e4b..b770ac9029 100644
--- a/doc/guides/prog_guide/asan.rst
+++ b/doc/guides/prog_guide/asan.rst
@@ -39,7 +39,7 @@ to define ASAN_SHADOW_OFFSET.
 Example heap-buffer-overflow error
 ----------------------------------
 
-Add below unit test code in examples/helloworld/main.c::
+Add the following unit test code to examples/helloworld/main.c::
 
     Add code to helloworld:
     char *p = rte_zmalloc(NULL, 9, 0);
@@ -49,7 +49,9 @@ Add below unit test code in examples/helloworld/main.c::
     }
     p[9] = 'a';
 
-Above code will result in heap-buffer-overflow error if ASan is enabled, because apply 9 bytes of memory but access the tenth byte, detailed error log as below::
+This code will result in a heap-buffer-overflow error if ASan is enabled,
+because it allocates 9 bytes of memory but accesses the tenth byte.
+Detailed error log::
 
     ==369953==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x7fb17f465809 at pc 0x5652e6707b84 bp 0x7ffea70eea20 sp 0x7ffea70eea10 WRITE of size 1 at 0x7fb17f465809 thread T0
     #0 0x5652e6707b83 in main ../examples/helloworld/main.c:47
@@ -59,7 +61,7 @@ Above code will result in heap-buffer-overflow error if ASan is enabled, because
     Address 0x7fb17f465809 is a wild pointer.
     SUMMARY: AddressSanitizer: heap-buffer-overflow ../examples/helloworld/main.c:47 in main
 
-Note::
+.. Note::
 
   - Some of the features of ASan (for example, 'Display memory application location, currently
     displayed as a wild pointer') are not currently supported with DPDK allocations.
@@ -67,7 +69,7 @@ Note::
 Example use-after-free error
 ----------------------------
 
-Add below unit test code in examples/helloworld/main.c::
+Add the following unit test code to examples/helloworld/main.c::
 
     Add code to helloworld:
     char *p = rte_zmalloc(NULL, 9, 0);
@@ -78,7 +80,9 @@ Add below unit test code in examples/helloworld/main.c::
     rte_free(p);
     *p = 'a';
 
-Above code will result in use-after-free error if ASan is enabled, because apply 9 bytes of memory but access the first byte after release, detailed error log as below::
+This code will result in a use-after-free error if ASan is enabled,
+because it accesses the first byte of memory after it has been freed.
+Detailed error log::
 
     ==417048==ERROR: AddressSanitizer: heap-use-after-free on address 0x7fc83f465800 at pc 0x564308a39b89 bp 0x7ffc8c85bf50 sp 0x7ffc8c85bf40 WRITE of size 1 at 0x7fc83f465800 thread T0
     #0 0x564308a39b88 in main ../examples/helloworld/main.c:48
-- 
2.51.0