Change the word "env var" to "environment variable"

docs/env_variables.md

@@ -564,7 +564,7 @@ The QEMU wrapper used to instrument binary-only code supports several settings:
     general purpose registers and restore them in each persistent cycle.
 
   - Another modality to execute the persistent loop is to specify also the
-    `AFL_QEMU_PERSISTENT_RET=end addr` env variable. With this variable
+    `AFL_QEMU_PERSISTENT_RET=end addr` environment variable. With this variable
     assigned, instead of patching the return address, the specified instruction
     is transformed to a jump towards `start addr`.
 

docs/features.md

@@ -19,8 +19,8 @@ QEMU 5.1 with laf-intel and redqueen, frida mode, unicorn mode, gcc plugin, full
 | Snapshot LKM Support     |         |    (x)(8) |    (x)(8)  |                  |        (x)(5)    |                  |                  |
 | Shared Memory Test cases |         |     x     |     x      | x86[_64]/arm64   |         x        |         x        |                  |
 
-1. default for LLVM >= 9.0, env var for older version due an efficiency bug in
-   previous llvm versions
+1. default for LLVM >= 9.0, environment variable for older version due an
+   efficiency bug in previous llvm versions
 2. GCC creates non-performant code, hence it is disabled in gcc_plugin
 3. with `AFL_LLVM_THREADSAFE_INST`, disables NeverZero
 4. with pcguard mode and LTO mode for LLVM 11 and newer

docs/important_changes.md

@@ -48,8 +48,9 @@ behaviors and defaults:
     * deterministic fuzzing is now disabled by default (unless using -M) and
       can be enabled with -D
     * a caching of test cases can now be performed and can be modified by
-      editing config.h for TESTCASE_CACHE or by specifying the env variable
-      `AFL_TESTCACHE_SIZE` (in MB). Good values are between 50-500 (default: 50).
+      editing config.h for TESTCASE_CACHE or by specifying the environment
+      variable `AFL_TESTCACHE_SIZE` (in MB). Good values are between 50-500
+      (default: 50).
     * -M mains do not perform trimming
   * examples/ got renamed to utils/
   * libtokencap/ libdislocator/ and qdbi_mode/ were moved to utils/