adjusted eval/printf calls in .value()

README.asciidoc

@@ -103,6 +103,7 @@ The Series constructor has the following signatures:
 * +Series(7, 2)+ -> 7, 9, 11, ...
 * +Series(2, 7)+ -> 2, 9, 16, ...
 * +Series('nexus#alpha')+ -> 'a', 'b', 'c', ...
+* +Series('(%d) ')+ -> (0)
 
 Nexus's Series Objects provide the following methods:
 

plugin/nexus.vim

@@ -139,8 +139,8 @@ function! Series(...)
     let index = a:0 ? a:1 : (self.index - 1)
     let value = (index <= 0 ? self.values[0] : self.values[index])
     return self.use_printf
-          \ ? eval(printf(self.format, "'" . value . "'"))
-          \ : eval(substitute(self.format, '\C\<x:nexus\>', 'value', 'g'))
+          \ ? printf(self.format, eval('"' . escape(value, '"') . '"'))
+          \ : eval('"' . escape(substitute(self.format, '\C\<x:nexus\>', value, 'g'), '"') . '"')
   endfunc
 
   call call(incrementor.init, a:000, incrementor)

test/003_linear_format.vim

@@ -0,0 +1,33 @@
+call vimtest#StartTap()
+call vimtap#Plan(20) " <== XXX  Keep plan number updated.  XXX
+
+let s1_1 = Series('%d,')
+let s1_2 = Series('"%d,"')
+let s2_1 = Series('x:nexus,')
+let s2_2 = Series('"x:nexus,"')
+
+call vimtap#Is(s1_1.value(), '0,', '.value() == initial_value')
+call vimtap#Is(s1_1.next(),  '0,', '.next() steps correctly')
+call vimtap#Is(s1_1.next(),  '1,', '.next() steps correctly')
+call vimtap#Is(s1_1.next(),  '2,', '.next() steps correctly')
+call vimtap#Is(s1_1.next(),  '3,', '.next() steps correctly')
+
+call vimtap#Is(s1_2.value(), '"0,"', '.value() == initial_value')
+call vimtap#Is(s1_2.next(),  '"0,"', '.next() steps correctly')
+call vimtap#Is(s1_2.next(),  '"1,"', '.next() steps correctly')
+call vimtap#Is(s1_2.next(),  '"2,"', '.next() steps correctly')
+call vimtap#Is(s1_2.next(),  '"3,"', '.next() steps correctly')
+
+call vimtap#Is(s2_1.value(), '0,', '.value() == initial_value')
+call vimtap#Is(s2_1.next(),  '0,', '.next() steps correctly')
+call vimtap#Is(s2_1.next(),  '1,', '.next() steps correctly')
+call vimtap#Is(s2_1.next(),  '2,', '.next() steps correctly')
+call vimtap#Is(s2_1.next(),  '3,', '.next() steps correctly')
+
+call vimtap#Is(s2_2.value(), '"0,"', '.value() == initial_value')
+call vimtap#Is(s2_2.next(),  '"0,"', '.next() steps correctly')
+call vimtap#Is(s2_2.next(),  '"1,"', '.next() steps correctly')
+call vimtap#Is(s2_2.next(),  '"2,"', '.next() steps correctly')
+call vimtap#Is(s2_2.next(),  '"3,"', '.next() steps correctly')
+
+call vimtest#Quit()