Fix docs typos for zeroize related features/test
diff --git a/include/mbedtls/config.h b/include/mbedtls/config.h
index 7f0941f..69754cf 100644
--- a/include/mbedtls/config.h
+++ b/include/mbedtls/config.h
@@ -2856,7 +2856,7 @@
* \def MBEDTLS_UTILS_ZEROIZE_ALT
*
* Uncomment the macro to let mbed TLS use your alternate implementation of
- * mbedtls_zeroize(). This replaced the default implementation in utils.c.
+ * mbedtls_zeroize(). This replaces the default implementation in utils.c.
*
* mbedtls_zeroize() is a widely used function across the library to zero a
* block of memory. The implementation is expected to be secure in the sense
diff --git a/programs/test/zeroize.c b/programs/test/zeroize.c
index a7b94e2..9f77425 100644
--- a/programs/test/zeroize.c
+++ b/programs/test/zeroize.c
@@ -1,7 +1,7 @@
/*
* Zeroize application for debugger-driven testing
*
- * This is a simple test application used for debbuger-driven testing to check
+ * This is a simple test application used for debugger-driven testing to check
* whether calls to mbedtls_zeroize() are being eliminated by compiler
* optimizations. This application is used by the GDB script at
* tests/scripts/test_zeroize.gdb under the assumption that line numbers do not
