diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index 7a33bbc..3429bdd 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -1,3 +1,16 @@
+## 6.2.0
+
+* new commands eval and r-eval to quickly test a function without having to create a mulle-bashfunctions script
+* new commnads embed-booter and extract-booter to just add zsh/bash booting functionality to anotherwise non mulle-bashfunctions script
+* somewhat improved tracing speed
+* new function `r_smart_file_downcase_identifier` for C header shields for example e.g.  #ifndef `foo_h__`
+* bugfix for termux (android)
+* improved mulle-bashfunctions embedding (and update/removal) to create standalone scripts that don't need mulle-bashfunctions installed
+* fix `r_extensionless_filename`
+* add --silent-but-warn flag as a `MULLE_FLAG_LOG_TERSE` option
+* add `shell_is_builtin_command` function
+
+
 ## 6.1.0
 
 * somewhat improved tracing speed
diff --git a/mulle-bash b/mulle-bash
index 138c22b..880f0c7 100755
--- a/mulle-bash
+++ b/mulle-bash
@@ -145,7 +145,7 @@ fi
 # this is "our" version
 # the actual loaded version may differ (and will change this variable)
 #
-MULLE_BASHFUNCTIONS_VERSION="6.1.0"
+MULLE_BASHFUNCTIONS_VERSION="6.2.0"
 MULLE_BASHFUNCTIONS_LIBEXEC_DIRNAME="libexec"
 MULLE_EXECUTABLE="$1"
 
diff --git a/mulle-bashfunctions b/mulle-bashfunctions
index c627225..cab0311 100755
--- a/mulle-bashfunctions
+++ b/mulle-bashfunctions
@@ -58,6 +58,7 @@ Usage:
    * locate the "mulle-bashfunctions.sh" install path for a desired variant
    * show documentation for any of the defined functions
    * list the available libraries, which you can "include"
+   * run an arbitrary mulle-bashfunction with eval and r-eval
 
 Examples:
    Load "mulle-bashfunctions-all.sh" into the current interactive shell:
@@ -68,12 +69,14 @@ Commands:
    apropos <f>    : search for a function by keywords
    embed          : embed mulle-bashfunctions into a script
    env            : environment needed for "mulle-bashfunctions.sh"
+   eval <cmd>     : evaluate cmd inside of mulle-bashfunctions
    functions      : list defined functions
    hostname       : show system hostname used by mulle-bashfunctions
    libraries      : list available libraries
    load [variant] : use  eval \`mulle-bashfunctions load\`  to load
    man <function> : show documention for function, if available
    path [variant] : path to "mulle-bashfunctions.sh"
+   r-eval <cmd>   : evaluate cmd inside of mulle-bashfunctions and print RVAL
    username       : show username used by mulle-bashfunctions
    uname          : show system short name used by mulle-bashfunctions
    version        : print currently used version
@@ -698,6 +701,9 @@ Usage:
    A convenient place to place these marker sis right after the booter
    (below MULLE_EXECUTABLE_VERSION if that line exists).
 
+   Use mulle-bashfunctions boot-embed/boot-extract, if you just want to add
+   or remove the boot code.
+
 EOF
    exit 1
 }
@@ -971,6 +977,10 @@ main()
             usage
          ;;
 
+         -f|--force)
+            MULLE_FLAG_MAGNUM_FORCE='YES'
+         ;;
+
          --version)
             printf "%s\n" "${MULLE_BASHFUNCTIONS_VERSION}"
             exit 0
@@ -1015,10 +1025,18 @@ MULLE_HOSTNAME=\"${MULLE_HOSTNAME}\"
 MULLE_UNAME=\"${MULLE_UNAME}\""
       ;;
 
+      embed-boot)
+         mulle_boot_embed "$@"
+      ;;
+
       embed)
          mulle_boot_embed "$@" | mulle_bashfunctions_embed "$@"
       ;;
 
+      extract-boot)
+         mulle_boot_extract "$@"
+      ;;
+
       extract|unembed)
          mulle_boot_extract "$@" | mulle_bashfunctions_extract "$@"
       ;;
@@ -1082,6 +1100,35 @@ export MULLE_UNAME ;
          echo "${MULLE_BASHFUNCTIONS_LIBEXEC_DIR}/mulle-bashfunctions${format}.sh"
       ;;
 
+      # useful for accessing a single function from the library
+      eval)
+         include "path"
+         include "file"
+         include "case"
+         include "parallel"
+         include "sort"
+         include "url"
+         include "version"
+
+         "$@"
+         return $?
+      ;;
+
+      # useful for accessing a r function from the library
+      r-eval)
+         include "path"
+         include "file"
+         include "case"
+         include "parallel"
+         include "sort"
+         include "url"
+         include "version"
+
+         "$@" || return $?
+         printf "%s\n" "${RVAL}"
+         return 0
+      ;;
+
       shell)
          printf "%s\n" `ps -h -o cmd -p $$ | awk '{ print $1 }'`
       ;;
diff --git a/src/mulle-case.sh b/src/mulle-case.sh
index eb42155..2a5ad16 100644
--- a/src/mulle-case.sh
+++ b/src/mulle-case.sh
@@ -246,6 +246,13 @@ function r_smart_file_downcase_identifier()
 
    r_de_camel_case_identifier "$s"
    r_lowercase "${RVAL}"
+
+   # this to have _MulleFoo not produce __mulle_foo but _mulle_foo
+   case "${s}" in
+      +(_)[A-Z]*)
+         RVAL="${RVAL#_}"
+      ;;
+   esac
 }