diff --git a/Readme.md b/Readme.md
index ac7337b..160eb26 100644
--- a/Readme.md
+++ b/Readme.md
@@ -1,11 +1,10 @@
 
 ### BUGS
+-  (read-file "nonexisting/file.csv") shows only "could not open file"
 
 ### TODO
-- test whether AIG,,,10 csv row is parsed
 - support for (), nil, t, in lsp code replace 0 by nil in logicals
 - some performance functionality (at least counting how many times symbol was evaluated)
-- download 10 years of data from api.nasdaq.com into test dir
 - documentation
 - add url of source/inspiration to clib/*.cpp
 - add stdtest - to test every functionality 
@@ -27,6 +26,8 @@
 - string functions
     - compare - needed for sorting
     - uppper/lower case
+    - trim
+    - replace
 - regexp functions    
 - date support
   - decode-universal-time
@@ -36,22 +37,23 @@
 - add hash datatype
 - conversion functions like parse-integer
 - in test.lisp some explaining prints
-- format (printf)
+- format (sprintf)
 - setq
 - mapcar (funcall, apply)
 
 #### Performance
 - push_back - repeatedly without reserving size
+- mini_sprintf - unnecesary copying between vector and list
 
 #### Install
 ```
 cp build/ml /usr/local/bin/ml
-cp stdlib/stdlib.lsp /usr/local/var/mlisp/stdlib.lsp
+cp stdlib/*.lsp /usr/local/var/mlisp/
 ```
 
 #### Compile
 ```
-gcc -o ml -I/usr/local/opt/openssl/include -Iclib -L/usr/local/lib -L/usr/local/opt/openssl/lib -lm -lstdc++ -lcrypto -lssl -Wl,-stack_size -Wl,0x1000000 --std=c++17  ml.cpp ml_io.cpp ml_date.cpp ml_string.cpp clib/json11.cpp clib/csvparser.cpp clib/sslclient.cpp
+gcc -o ml -I/usr/local/opt/openssl/include -Iclib -L/usr/local/lib -L/usr/local/opt/openssl/lib -lm -lstdc++ -lcrypto -lssl -Wl,-stack_size -Wl,0x1000000 --std=c++17  ml.cpp ml_io.cpp ml_date.cpp ml_string.cpp clib/json11.cpp clib/csvparser.cpp clib/sslclient.cpp clib/printf.cpp
 ```
 or
 cmake
diff --git a/debug.lsp b/debug.lsp
index 4454ad6..8e38ea0 100644
--- a/debug.lsp
+++ b/debug.lsp
@@ -1,35 +1,26 @@
 
-; (print (sprintf "\033[31mred text"))
-; (print (sprintf "\x1B[31mred text"))
+;; (print (sprintf "%.2f" (list 1.25)))
+
+;; (print (sprintf "%.2f" '(1.23456)))
+;; (print (sprintf "%d" '(10000000)))
+
+(define q 1.23)
+(print (sprintf "%+.2f%%" (list q)))
+
+(define q -1.23)
+(print (sprintf "%+.2f%%" (list q)))
 
 (define term-rst-esc "\x1B[0m")
 (define term-red-esc '"\x1B[31m")
 (define term-green-esc "\x1B[32m")
-(define term-yellow-esc "\x1B[33m")
-(define term-blue-esc "\x1B[34m")
-(define term-magenta-esc "\x1B[35m")
-(define term-cyan-esc "\x1B[36m")
-(define term-white-esc "\x1B[37m")
-(define term-bold-esc "\x1B[1m")
-(define term-underline-esc "\x1B[4m")
 
 (defun term-red (str) (sprintf (+ term-red-esc str term-rst-esc)))
-(defun term-green (str) (sprintf (+ term-green-esc str term-rst-esc)))
-(defun term-yellow (str) (sprintf (+ term-yellow-esc str term-rst-esc)))
-(defun term-blue (str) (sprintf (+ term-blue-esc str term-rst-esc)))
-(defun term-magenta (str) (sprintf (+ term-magenta-esc str term-rst-esc)))
-(defun term-cyan (str) (sprintf (+ term-cyan-esc str term-rst-esc)))
-(defun term-white (str) (sprintf (+ term-white-esc str term-rst-esc)))
-(defun term-bold (str) (sprintf (+ term-bold-esc str term-rst-esc)))
-(defun term-underline (str) (sprintf (+ term-underline-esc str term-rst-esc)))
 
-(print (term-red "red text"))
-(print (term-green "green text"))
-(print (term-yellow "yellow text"))
-(print (term-blue "blue text"))
-(print (term-magenta "magenta text"))
-(print (term-cyan "cyan text"))
-(print (term-white "white text"))
-(print (term-bold "bold text"))
-(print (term-underline "underline text"))
-(print "normal text")
+(print (term-red "red") (sprintf "%.2f" (list 1.11)) "ss")
+
+    (define q_change_str (sprintf "%+.2f %%" (list q)))
+    ;; (if (>= q_change 0.0) 
+    ;;     (define q_change_str (term-green q_change_str))
+    ;;     (define q_change_str (term-red q_change_str)))
+
+    
\ No newline at end of file
diff --git a/ml.cpp b/ml.cpp
index 0b10968..ab8b0f8 100644
--- a/ml.cpp
+++ b/ml.cpp
@@ -477,7 +477,7 @@ MlValue MlValue::operator%(const MlValue &other) const {
 }
 
 // Get the name of the type of this value
-std::string MlValue::get_type_name() {
+std::string MlValue::get_type_name() const {
 	switch (type) {
 		case QUOTE:
 			return QUOTE_TYPE;
@@ -1524,7 +1524,6 @@ namespace builtin {
 	MlValue sprintf(std::vector<MlValue> args, MlEnvironment &env) {
 		eval_args(args, env);
 
-		std::string result;
 		if (args.size() < 1 || args.size() > 2)
 			throw MlError(MlValue("sprintf", sprintf), env, args.size() > 2 ? TOO_MANY_ARGS : TOO_FEW_ARGS);
 
diff --git a/ml.h b/ml.h
index fa9c685..50ffa53 100644
--- a/ml.h
+++ b/ml.h
@@ -182,7 +182,7 @@ public:
     MlValue operator%(const MlValue &other) const;
 
     // Get the name of the type of this value
-    std::string get_type_name();
+    std::string get_type_name() const;
 
     std::string display() const;
 
diff --git a/tests/test.lsp b/tests/test.lsp
index d8c4d37..d2cff1d 100644
--- a/tests/test.lsp
+++ b/tests/test.lsp
@@ -158,9 +158,13 @@
 (print "list:" l)
 (print "flatten-ed list:" (flatten l))
 
+(print (sprintf "%.2f" (list 1.25)))
+
 (print (sprintf "%.2f" '(1.23456)))
 (print (sprintf "%d" '(10000000)))
 
+(define q 1.23)
+(print (sprintf "%.2f" (list q)))
 
 (print (term-red "red text"))
 (print (term-green "green text"))