write.fwf column names don't line up with values

The following code produces a table whose column names don't line up with its values:

library( gdata )
test0 <- matrix(5:28, nrow = 4) 
row.names(test0) <- paste("r", 1:4, sep = "")
colnames(test0) <- paste("c", 1:6, sep = "")

test0[3, 2] <- 1234567890
test0[ , 3] <- 0.19412341293479123840214

test0 <- format(test0, digits = 5, trim = T, width = 10, scientific = T)

write.fwf(test0, file = paste("test", ".txt", sep = ""), width = 11, rowname = T, colname = T, quote = F) 

How can I make column names line up with each column's values (in order to have the table to be readable by GAMS)?

Curious that the column names are not treated in the same way. A work-around could be to add the column names as a row in the table and then write the table without column names...

i.e.

test1 <- rbind( colnames(test0) , test0 )
write.fwf(test1, file = paste("test", ".txt", sep = ""),
          width = 11,
          rownames = T,
          colnames = F,  #Don't print the column names
          quote = F )

This looks like: